Method and apparatus for sharing content

ABSTRACT

A method and apparatus for sharing content by selecting a device with which the content is to be shared and performing authentication by using a device which is being called. The method of sharing content of a first device includes: performing authentication of a remote access service for sharing the content with a second device based on a call connection state between the first device and the second device; remotely accessing the second device according to a result of the authentication; and sharing the content based on the remote access.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority benefit of Korean PatentApplication No. 10-2012-0093255, filed on Aug. 24, 2012, in the KoreanIntellectual Property Office, the disclosure of which is incorporatedherein in its entirety by reference.

BACKGROUND

1. Field

Example embodiments of the present disclosure relate to a method andapparatus for sharing content, and more particularly, to a method andapparatus for connecting devices and sharing content based on a callconnection state between the devices.

2. Description of the Related Art

In order to share content that is stored in a device, a user generallysearches for a device with which the content is to be shared, obtainsnetwork information, and performs an authentication process for sharingthe content by being connected to the device with which the content isto be shared.

However, in this case, the user is inconvenienced because the user hasto directly search for the device with which the content is to beshared.

SUMMARY

Additional aspects and/or advantages will be set forth in part in thedescription which follows and, in part, will be apparent from thedescription, or may be learned by practice of the disclosure.

The present disclosure provides a method and apparatus for sharingcontent by simply using a device which is being called without forcing auser to search for the content and to perform a separate authenticationprocess for sharing the content.

According to an aspect of the present disclosure, there is provided amethod of sharing content of a first device, the method including:performing authentication of a remote access service for sharing thecontent with a second device based on a call connection state betweenthe first device and the second device; remotely accessing the seconddevice according to a result of the authentication; and sharing thecontent based on the remote access.

The remotely accessing the second device may include: obtaining networkinformation about the second device according to the result of theauthentication; and remotely accessing the second device by using thenetwork information.

The performing of the authentication may include performing theauthentication in further consideration of whether a phone number of thesecond device is stored in the first device.

The performing of the authentication may include: transmittingauthentication information that requests an authentication server toauthenticate the remote access service to the authentication server; andreceiving information about the result of the authentication based onthe call connection state between the first device and the second devicefrom the authentication server.

The transmitting of the authentication information to the authenticationserver may include: storing an encryption key for the authentication;and when a phone number of the second device is stored in the firstdevice, transmitting the stored encryption key to the authenticationserver along with the authentication information that requests theauthentication server to authenticate the remote access service.

The performing of the authentication may include transmitting a text forperforming the authentication of the remote access service to the seconddevice.

The performing of the authentication may include transmitting voice datagenerated by the first device to the second device, wherein the voicedata is for receiving rights to share the content and remotely accessthe second device from the second device.

The performing of the authentication may include: generating informationabout a gesture input for the first device; and transmitting theinformation about the gesture to the second device.

The performing of the authentication may include: receiving aninstruction to make a motion through a call from a user of the seconddevice; moving the first device, based on the instruction; andgenerating information about the motion by using an operation sensorincluded in the first device.

The performing of the authentication may include: transmittingauthentication information that requests the second device toauthenticate the remote access service to the second device; andreceiving the result of the authentication of the remote access servicefrom the second device.

The method may further include checking information about networks whichthe second device may access through a mobile communication network usedfor call connection, wherein the remotely accessing the second deviceincludes accessing the second device according to the information aboutthe networks which the second device may access and the result of theauthentication.

The sharing of the content may include: receiving information aboutdevices connected to the second device from the second device based onthe result of the authentication; displaying a list of the devicesconnected to the second device and selecting a third device to which thecontent is to be transmitted in the list; obtaining network informationof the third device; accessing the third device by using the networkinformation of the third device; and sharing the content with the thirddevice.

The displaying of the list of the devices connected to the second deviceand the selecting of the third device with which the content is to beshared may include: selecting a device which may reproduce the contentfrom among the devices connected to the second device; and displaying alist of the selected device.

The method may further include: displaying a list of pieces of contentwhich the first device may share; and selecting content to be shared inthe displayed list.

The selecting of the content may include: displaying the second deviceand a list of devices connected to the second device; and selecting thecontent based on a drag and drop event between the second device and thelist of devices connected to the second device from the displayed listof pieces of content.

The content may be stored in at least one of the first device, a deviceconnected to a network to which the first device belongs, and a cloudserver.

The performing of the authentication may include: obtainingidentification information about a user of the first device; andperforming the authentication in further consideration of theidentification information about the user of the first device.

According to another aspect of the present disclosure, there is providedan authentication method performed by a server to share content, theauthentication method including: receiving information that requests aremote access service for sharing content with a second device to beauthenticated from a first device; obtaining information about a callconnection state between the first device and the second device; andperforming authentication of rights of the first device to remotelyaccess the second device and to share the content based on theinformation about the call connection state.

The performing of the authentication may further include transmittinginformation about a result of the authentication to the first device andthe second device.

The performing of the authentication may include using the informationabout the call connection state between the first device and the seconddevice as an encryption key for the authentication.

The performing of the authentication may include: obtaining informationabout whether a phone number of the second device is stored in the firstdevice; and performing the authentication in further consideration ofwhether the phone number of the second device is stored.

The performing of the authentication may include: receiving voice datafrom the first device and the second device; and performing theauthentication in further consideration of the received voice data.

The performing of the authentication may include: receiving informationabout a gesture input to each of the first device and the second devicefrom the first device and the second device; and performing theauthentication in further consideration of the received informationabout the gesture.

The performing of the authentication may include: receiving informationabout whether the authentication is acknowledged from the second device;and performing the authentication in further consideration about theinformation about whether the authentication is acknowledged.

According to another aspect of the present disclosure, there is provideda first device for sharing content, the first device including: anauthentication unit that performs authentication of a remote accessservice for sharing the content on a second device based on a callconnection state between the first device and the second device; and acontent sharing unit that remotely accesses the second device based on aresult of the authentication and shares the content with the seconddevice based on the remote access.

The first device may further include a storage unit that stores a phonenumber, wherein the authentication unit performs the authentication ofthe remote access service in further consideration of whether a phonenumber of the second device is stored in the storage unit.

The first device may further include an informationtransmitting/receiving unit that transmits authentication informationabout the remote access service to a server and receives informationabout the result of the authentication from the server, wherein theauthentication unit performs the authentication of the remote accessservice based on the result of the authentication received by theinformation transmitting/receiving unit.

The first device may further include a storage unit that stores anencryption key for the authentication, wherein when a phone number ofthe second device is stored in the storage unit, the informationtransmitting/receiving unit shares the stored encryption key with theserver along with the authentication information.

The first device may further include an informationtransmitting/receiving unit that transmits a text for the authenticationof the remote access service to the second device.

The first device may further include an informationtransmitting/receiving unit that shares voice data generated by thefirst device with the second device, wherein the voice data is for theauthentication of the remote access service.

The first device may further include a gesture input unit that generatesinformation about a gesture input for the first device, wherein theauthentication unit generates authentication information including theinformation about the gesture.

The content sharing unit may include a network connection unit thatchecks information about networks which the second device may accessthrough a mobile communication network used for call connection and isconnected to the second device by using the information about thenetworks which the second device may access.

The content sharing unit may include a network connection unit thatreceives information about devices connected to the second device basedon the remote access from the second device, selects a third device withwhich the content is to be shared from among the devices connected tothe second device, and remotely accesses the selected third device, andshares the content with the third device.

According to another aspect of the present disclosure, there is providedan authentication server for sharing content, the authentication serverincluding: a call connection state checking unit that obtainsinformation about a call connection state between a first device and asecond device; an authentication unit that performs authentication of aremote access service for sharing the content of the first device withthe second device based on the information about the call connectionstate; and an authentication result transmitting unit that transmitsinformation about a result of the authentication to the first device andthe second device.

The authentication unit may use the information about the callconnection state between the first device and the second device as anencryption key for the authentication.

The authentication unit may obtain information about whether a phonenumber of the second device is stored in the first device and performthe authentication in further consideration of whether the phone numberof the second device is stored.

The authentication unit may receive voice data from the first device andthe second device and perform the authentication in furtherconsideration of the received voice data.

The authentication unit may receive information about a gesture input toeach of the first device and the second device from the first device andthe second device and perform the authentication in furtherconsideration of the received information about the gesture.

The authentication unit may receive information about whether theauthentication is acknowledged from the second device and perform theauthentication in further consideration of whether the authentication isacknowledged.

According to another aspect of the present disclosure, there is provideda system for sharing content, the system including: a first device tostore the content; a second device to receive the content; and apresence server to authenticate a remote access service for sharingcontent with the second device.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other features and advantages of the present disclosurewill become more apparent by describing in detail exemplary embodimentsthereof with reference to the attached drawings in which:

FIG. 1 is a diagram illustrating a system used by a first device toshare content with a second device, according to an example embodimentof the present disclosure;

FIG. 2 is a diagram illustrating a system used by the first device toshare content with the second device, according to another exampleembodiment of the present disclosure;

FIG. 3 is a flowchart illustrating a process performed by the firstdevice to share content with the second device, according to an exampleembodiment of the present disclosure;

FIG. 4 is a flowchart illustrating a process of performingauthentication in consideration of whether a phone number of the seconddevice is stored in the first device, according to an example embodimentof the present disclosure;

FIG. 5 is a flowchart illustrating a process performed by the firstdevice to perform authentication through a server, according to anexample embodiment of the present disclosure;

FIG. 6 is a flowchart illustrating a process performed by the firstdevice to perform authentication in further consideration of a texttransmitted/received to/from the second device, according to an exampleembodiment of the present disclosure;

FIG. 7 is a flowchart illustrating a process performed by the firstdevice to perform authentication in further consideration of voice datatransmitted/received to/from the second device, according to an exampleembodiment of the present disclosure;

FIG. 8 is a flowchart illustrating a process of performingauthentication in further consideration of information about a gestureinput to the first device, according to an example embodiment of thepresent disclosure;

FIG. 9 is a flowchart illustrating a process performed by the firstdevice to perform authentication with the second device, according to anexample embodiment of the present disclosure;

FIG. 10 is a flowchart illustrating a process performed by the firstdevice to be connected to the second device through a network, accordingto an example embodiment of the present disclosure;

FIG. 11 is a flowchart illustrating a process performed by the firstdevice to share content with a third device connected to the seconddevice, according to an example embodiment of the present disclosure;

FIG. 12 is a flowchart illustrating a process performed by the server toperform authentication based on a call connection state between thefirst device and the second device, according to an example embodimentof the present disclosure;

FIG. 13 is a block diagram illustrating the first device, according toan example embodiment of the present disclosure;

FIG. 14 is a block diagram illustrating the server, according to anembodiment of the present disclosure;

FIG. 15 is a diagram illustrating content a user interface for selectinga device with which the content is to be shared, according to an exampleembodiment of the present disclosure;

FIG. 16 is a diagram illustrating content to be shared by a first deviceand a user interface for selecting a device connected to the seconddevice which is to receive the content, according to an exampleembodiment of the present disclosure; and

FIG. 17 is a diagram illustrating content of the second device to bereceived from the second device and a user interface for selecting adevice connected to the first device which is to receive the content,according to an example embodiment of the present disclosure.

DETAILED DESCRIPTION

Reference will now be made in detail to the embodiments, examples ofwhich are illustrated in the accompanying drawings, wherein likereference numerals refer to the like elements throughout. Theembodiments are described below to explain the present disclosure byreferring to the figures.

Expressions such as “at least one of,” when preceding a list ofelements, modify the entire list of elements and do not modify theindividual elements of the list.

Hereinafter, the present disclosure will be described more fully withreference to the accompanying drawings, in which exemplary embodimentsof the disclosure are shown. The disclosure may, however, be embodied inmany different forms and should not be construed as being limited to theembodiments set forth herein; rather these embodiments are provided sothat this disclosure will be thorough and complete, and will fullyconvey the concept of the disclosure to one of ordinary skill in theart. Also, parts in the drawings unrelated to the detailed descriptionare omitted to ensure clarity of the present disclosure. Like referencenumerals in the drawings denote like elements.

Throughout the specification, it will be understood that when an elementis referred to as being “connected” to another element, it may be“directly connected” to the other element or “electrically connected” tothe other element with intervening elements therebetween. It will befurther understood that when a part “includes” or “comprises” anelement, unless otherwise defined, the part may further include otherelements, not excluding the other elements. Also, it will be understoodthat when “content is transmitted”, unless otherwise defined, it maymean that the content is shared and when “content is received”, it mayalso mean that the content is shared.

The present disclosure will now be described more fully with referenceto the accompanying drawings, in which exemplary embodiments of thedisclosure are shown.

FIG. 1 is a diagram illustrating a system used by a first device 110 toshare content with a second device 120, according to an exampleembodiment of the present disclosure.

The first device 110 may call the second device 120 over a communicationnetwork. Each of the first device 110 and the second device 120 may be amobile phone which may make a call and communicate data to otherdevices, or an electronic device such as a tablet personal computer(PC), however, the present disclosure is not limited thereto.

The first device 110 may perform authentication for sharing content withthe second device 120, and may remotely access the second device 120through a network 140. The first device 110 may share the content withthe second device 120 based on the remote access through network 140.

For example, while the first device 110 is calling the second device120, a command to share content with a device which is being called,i.e., the second device 120, may be input to the first device 110. Thefirst device 110 may request the second device 120 which is being calledto authenticate a remote access service for sharing the content. Thecontent to be shared with the second device 120 may be stored in thefirst device 110, in a device connected to the first device 110, or in acloud server. The first device 110 may receive from the second device120 information indicating that the authentication requested to thesecond device 120 has been completed and an Internet protocol (IP)address for accessing the second device 120. The first device 110 mayremotely access the second device 120 through the Internet by using theIP address received from the second device 120. The first device 120 maytransmit the content to the second device 120 and enable the contenttransmitted to the second device 120 to be displayed based on the remoteaccess to the second device 120.

Also, the first device 110 may remotely access a third device 130, whichis connected to a local network that is connected to the second device120, to share the content with the third device 130.

For example, when the third device 130 is connected according to adigital living network alliance (DLNA) standard through the same accesspoint (AP) as the second device 120, the first device 110 may receiveinformation about the third device 130 connected to the second device120 from the second device 120 which is being called. Next, the firstdevice 110 may remotely access the third device 130 by using IPinformation of the third device 130 included in the received informationabout the third device 130. Additionally, other devices may be connectedto the same AP as the second device 120 and the third device 130, andthus, the first device 110 may receive information about the otherdevices connected to the same AP as the second device 120.

FIG. 2 is a diagram illustrating a system used by the first device 110to share content with the second device 120, according to anotherexample embodiment of the present disclosure.

While the first device 110 is calling the second device 120, the firstdevice 110 may request a presence server 210 to authenticate a remoteaccess service for sharing content with the second device 120. A serverof a base station 200 may check a call connection state between thefirst device 110 and the second device 120. The presence server 210 mayobtain information about the call connection state between the firstdevice 120 and the second device 120 from the server of the base station200. When it is determined that the first device 110 is calling thesecond device 120, the presence server 210 may transmit to the firstdevice 110 and the second device 120 information about a result of theauthentication indicating that the authentication has been completed.

The presence server 210 may transmit network information about thesecond device 120 to the first device 110. For example, the presenceserver 210 may transmit to the first device 110 IP information of thesecond device 120 stored in the presence server 210 or IP informationreceived from the second device 120.

When receiving the information about the result of the authenticationindicating that the authentication has been completed from the presenceserver 210, the first device 110 may transmit the content to the seconddevice 120. The first device 110 may remotely access the second device120 by using the network information received from the presence server210, may transmit the content based on the remote access, and maycontrol the second device 120 to reproduce or display the content.

Although the presence server 210 and the server of the base station 200are separately shown in FIG. 2, the presence server 210 and the serverof the base station 200 may not necessarily be separated, and mayconstitute one server. The term “server” used herein may refer to anauthentication server.

FIG. 3 is a flowchart illustrating a process performed by the firstdevice 110 to share content with the second device 120, according to anexample embodiment of the present disclosure.

In operation S310, the first device 110 may call the second device 120over a communication network. Next, in operation S320, the first device110 may perform authentication of a remote access service for sharingcontent on or with the second device 120 which is being called.

For example, the first device 110 may transmit information that requeststhe second device 120 to authenticate the remote access service to thesecond device 120 which is being called. The first device 110 mayreceive information about a result of the authentication performed bythe second device 120 according to the information that requests thesecond device 120 to authenticate the remote access service. When thefirst device 110 receives the information about the result of theauthentication from the second device 120, the first device 110 maycomplete the authentication of the remote access service.

Alternatively, depending on embodiments, the first device 110 maytransmit authentication information to a server. The authenticationinformation may include information that requests the second device 120to authenticate the remote access service based on a call connectionstate. For example, the authentication information may include at leastone of identification information of the first device 110,identification information of the second device 120, and identificationinformation of the remote access service. The first device 110 mayreceive information about a result of the authentication based on thecall connection state between the first device 110 and the second device120 from the server. When the first device 110 has received theinformation about the result of the authentication, the first device 110may complete the authentication of the remote access service.

Alternatively, depending on embodiments, when the first device 110performs authentication for sharing content while calling the seconddevice 120, the first device 110 may obtain an image by driving aphotographing unit included in the first device 110. The first device110 may transmit the image obtained by the photographing unit to thesecond device 120. The second device 120 may obtain and display theimage, and may receive an input about whether authentication isacknowledged from a user. That is, for example, when a face of a user ofthe first device 110 is photographed and is displayed on the seconddevice 120, a user of the second device 120 may check the face of theuser of the first device 110 and may input about whether authenticationis acknowledged.

Alternatively, depending on embodiments, the first device 110 maydisplay a list of pieces of content which may be shared while callingthe second device 120. When the first device 110 transmits content tothe second device 120, the pieces of content which may be shared may becontent that is stored in the first device 110, in a device connected tothe first device 110, or in a cloud server. Also, when the first device110 receives content, the pieces of content which may be shared may becontent stored in the second device 120, in a device connected to thesecond device 120, or the cloud server. The first device 110 may selectcontent to be shared, among the pieces of content available for sharing,with the second device 120 from the displayed list of pieces of content.For example, the first device 110 may select some in the list of piecesof content as shown in list 1500 of FIG. 15.

Also, the first device 110 may further obtain identification informationabout the user of the first device 110, and may perform authenticationin further consideration of the identification information about theuser.

For example, the first device 110 may perform a login operation by usingan ID or a password stored in the first device 110 or received as aninput from the user. Next, when the first device 110 requests a server1400 (shown in FIG. 14) to authenticate a remote access service, thefirst device 110 may transmit a session ID for a login session to theserver 1400. The server 1400 may perform authentication according to theauthentication request when the login session corresponding to thesession ID is maintained.

Next, in operation S330, the first device 110 may remotely access thesecond device 120 based on a result of the authentication, and maytransmit the content to the second device 120 based on the remote accessto the second device 120.

For the remote access to the second device 120, the first device 110 mayobtain network information about the second device 120 when theauthentication of the remote access service has been completed. Thefirst device 110 may remotely access the second device 120 based on thenetwork information about the second device 120 after the authenticationof the remote access service has been successful. The networkinformation may include information used by the first device 110 toaccess the second device 120.

For example, while the first device 110 is calling the second device120, the first device 110 may display a list of pieces of content storedin the first device 110. For example, the list of pieces of content maybe the list 1500 of FIG. 15. The first device 110 may select content tobe shared with the second device 120 which is being called from thedisplayed list of pieces of content. The first device 110 may transmit arequest to the second device 120 for authenticating a remote accessservice for sharing the selected content with the second device 120.When the second device 120 which is requested to authenticate the remoteaccess service is being called, the second device 120 may transmit tothe first device 110 information indicating that the authentication ofthe remote access service has been completed. As the authentication ofthe remote access service has been completed, the second device 120 maytransmit network information including an IP address of the seconddevice 120 to the first device 110. The first device 110 may thenremotely access the second device 120 by using the IP address of thesecond device 120 that was received from the second device 120. Thefirst device 110 may transmit the selected content to the second device120 which is remotely accessed, and may enable the content transmittedto the second device 120 to be outputted or displayed.

Alternatively, depending on embodiments, when the first device 110 iscalling the second device 120, the first device 110 may display a listof pieces of content stored in the cloud server. For example, the listof pieces of content may be the list 1500 of FIG. 15. The first device110 may select content to be shared with the second device 120 which isbeing called from the displayed list of pieces of content. The firstdevice 110 may transmit a request to the server 1400 to authenticate aremote access service for sharing the selected content with the seconddevice 120. The server 1400 which is requested to authenticate theremote access service may check whether the first device 110 is callingthe second device 120 through a connection state checking unit 1420included in the server 1400 (as shown in FIG. 14) or the server of thebase station 200. When it is determined that the first device 110 iscalling the second device 120, the server 1400 may transmit to the firstdevice 110 and the second device 120 information indicating that theauthentication of the remote access service has been completed. As theauthentication has been completed, the server 1400 may receive an IPaddress of the second device 120 from the second device 120. The server1400 may transmit the IP address of the second device 120 to the firstdevice 110. The first device 110 may then remotely access the seconddevice 120 by using the IP address of the second device 120, which wasreceived from the server 1400. The first device 110 may request thecloud server to transmit the selected content to the second device 120which is remotely accessed, and may enable the content transmitted tothe second device 120 to be outputted or displayed.

Alternatively, depending on embodiments, the first device 110 mayremotely access the third device 130, which is connected to the seconddevice 120, and may share content with the third device 130. The thirddevice 130 may be a device connected to a home network or a localnetwork (or to the same AP as the second device 120) which the seconddevice 120 accesses. For example, when the second device 120 is a mobilephone, the third device 130 may be a television connected according to aDLNA standard through the same access point as the mobile phone.However, the above description of the second device 120 and the thirddevice 130 are examples, and thus, the present disclosure is not limitedthereto.

Alternatively, depending on embodiments, the third device 130 may be adevice which is directly connected to the second device 120. Forexample, the third device 130 may be a device which is connected to thesecond device 120 according to a Wi-Fi direct standard. Alternatively,the third device 130 may be a device connected according to any of otherstandards such as Bluetooth, Zigbee, or ultra WideBand (UWB). However,the present disclosure is not limited to the Bluetooth, Zigbee, or UWBstandards.

For example, in accordance with example embodiments of the presentdisclosure, while a daughter is calling her mother using a mobile phone,a moving picture stored in the mobile phone of the daughter may bereproduced on a television connected to a mobile phone of the mother.

FIG. 4 is a flowchart illustrating a process of performingauthentication in consideration of whether a phone number of the seconddevice 120 is stored in the first device 110, according to an exampleembodiment of the present disclosure.

In operation S410, the first device 110 may search for a phone number ofthe second device 120 in the first device 110 in order to authenticate aremote access service. The remote access service is a service foraccessing the second device 120 to transmit and reproduce content.

Next, in operation S420, the first device 110 may transmit informationthat requests the second device 120 or the server 1400 (refer to FIG.14) to authenticate the remote access service and information aboutwhether the phone number of the second device 120 is stored in the firstdevice 110.

Next, the first device 110 may receive information about a result of theauthentication from the second device 120 or the server 1400. It isdetermined in operation S430 whether the authentication of the remoteaccess service has succeeded. When it is determined in operation S430that the authentication of the remote access service has succeeded, theprocess proceeds to operation S440. In operation S440, the first device110 may remotely access the second device 120 and may transmit contentto the second device 120. When it is determined in operation S430 thatthe authentication of the remote service has not succeeded, then theprocess ends.

That is, as long as the phone number of the second device 120 which isbeing called by the first device 110 is stored in the first device 110,content may be shared.

FIG. 5 is a flowchart illustrating a process performed by the firstdevice 110 to perform authentication through the server 1400, accordingto an example embodiment of the present disclosure.

In operation S510, the first device 110 may check a call connectionstate with the second device 120. For example, the first device 110 maycheck whether a device is being called through a call applicationincluded in the first device 110 and a phone number of the device whichis being called. The first device 110 may identify the second device 120by using the phone number.

The first device 110 may determine the second device 120 as a device toshare content with based on the call connection state with the seconddevice 120.

Next, in operation S520, the first device 110 may transmitauthentication information that requests the server 1400 to authenticatea remote access service for sharing content with the second device 120to the server 1400.

The server 1400 may receive information about whether the phone numberof the second device 120 is stored in the first device 110 from thefirst device 110 along with the authentication information. The server1400 may use the information about whether the phone number of thesecond device 120 is stored in the first device 110 as an encryption keyin the remote access service.

Further, the first device 110 may check whether the phone number of thesecond device 120 is stored in the first device 110. When it isdetermined that the phone number of the second device 120 is stored inthe first device 110, the first device 110 may transmit an encryptionkey stored in the first device 110 along with the authenticationinformation that requests the server 1400 to authenticate the remoteaccess service to the server 1400.

Next, in operation S530, the first device 110 may receive informationabout a result of the authentication of the second remote access servicefrom the server 1400. In operation S540, it is determined whether theauthentication of the remote access service has succeeded. When it isdetermined in operation S540 that the authentication of the remoteaccess service has succeeded, the first device 110 may receive networkinformation about the second device 120. The first device 110 mayremotely access the second device 120 based on the received networkinformation.

When it is determined in operation S540 that the authentication of theremote access service has succeeded, the process proceeds to operationS550. In operation S550, the first device 110 may remotely access thesecond device 120 and may transmit content to the second device 120 tobe outputted or displayed on the second device 120.

FIG. 6 is a flowchart illustrating a process performed by the firstdevice 110 to perform authentication in further consideration of a texttransmitted/received to/from the second device 120, according to anexample embodiment of the present disclosure.

In operation S610, the first device 110 may transmit information thatrequests the second device 120 or the server 1400 to authenticate aremote access service to the second device 120 or the server 1400. Also,in operation S620, the first device 110 may receive a text from thesecond device 120.

Next, in operation S630, the first device 110 may transmit a text forauthenticating the remote access service to the second device 120.

For example, the first device 110 may receive a text including aquestion about the user of the first device 110, may receive a textincluding an answer to the question from or input by the user of thefirst device 110, and transmit the text to the second device 120. Thesecond device 120 may display the text received from the first device110, and may enable whether the user of the second device 120 checks andauthenticates the text to be input to the second device 120.

Alternatively, depending on embodiments, the text received by the seconddevice 120 may be compared with a preset answer, and when the receivedtext and the preset answer are the same, authentication may beperformed.

Next, in operation S640, it is determined whether the authentication ofthe remote access service has succeeded. When it is determined inoperation S640 that the authentication of the remote access service hassucceeded, the process proceeds to operation S650. In operation S650,the first device 110 may remotely access the second device 120 and maytransmit content to the second device 120. When it is determined inoperation S640 that the authentication of the remote access service hasnot succeeded, then the process ends.

FIG. 7 is a flowchart illustrating a process performed by the firstdevice 110 to perform authentication in further consideration of voicedata transmitted/received to/from the second device 120, according to anexample embodiment of the present disclosure.

In operation S710, the first device 110 may transmit information thatrequests the second device 120 or the server 1400 to authenticate aremote access service to the second device 120 or the server 1400. Also,in operation S720, the first device 110 may receive voice data from thesecond device 120. In operation S730, the first device 110 may generatevoice data and may transmit the generated voice data to the seconddevice 120 or the server 1400.

The second device 120 or the server 1400 may perform authentication infurther consideration of the received voice data. For example, the userof the second device 120 may ask a question to the user of the firstdevice 110 through a voice call, and the user of the first device 110may answer the question through the voice call. The second device 120may output the received voice data, may receive an input about whetherauthentication is to be performed from the user, and perform theauthentication. Alternatively, when the received voice data isrecognized and is the same as a preset answer, the authentication may beperformed.

In operation S740, it is determined whether the authentication hassucceeded when the first device 110 receives a result of theauthentication from the second device 120 or the server 1400. When it isdetermined that the authentication has succeeded, the process proceedsto operation S750. In operation S750, the first device 110 may remotelyaccess the second device 120, and may transmit content to the seconddevice 120. When it is determined that the authentication has notsucceeded, the process ends.

FIG. 8 is a flowchart illustrating a process of performingauthentication in further consideration of information about a gestureinput to the first device 110, according to an example embodiment of thepresent disclosure.

In operation S810, the first device 110 may transmit information thatrequests the second device 120 or the server 1400 to authenticate aremote access service to the second device 120 or the server 1400.

Next, in operation S820, the first device 110 may receive informationabout a gesture from the second device 120 or the server 1400. OperationS820 is not essential and thus may be omitted.

Next, in operation S830, the first device 110 may generate informationabout the gesture, and transmit the generated information about thegesture to the second device 120 or the server 1400. For example, whenthe user of the first device 110 who has received an instruction to makea circular motion through a call from the user of the second device 120moves the first device 110, the first device 110 may generateinformation about the circular motion by using an operation sensorincluded in the first device 110.

Next, the first device 110 may receive information about a result of theauthentication of the remote access service in further consideration ofthe information about the gesture of the second device 120 or the server1400. It is determined in operation S850 whether the authentication ofthe remote access service has succeeded. When it is determined inoperation S850 that the authentication of the remote access service hassucceeded, the process proceeds to operation S850. In operation S850,the first device 110 may remotely access the second device 120 and maytransmit content to the second device 120. When it is determined inoperation S850 that the authentication of the remote access service hasnot succeeded, then the process may end.

FIG. 9 is a flowchart illustrating a process performed by the firstdevice 110 to perform authentication with the second device 120,according to an example embodiment of the present disclosure.

In operation S910, the first device 110 may generate authenticationinformation. The authentication information may include at least one ofinformation for identifying the first device 110, information foridentifying the second device 110, information about a call connectionstate between the first device 110 and the second device 120, andinformation that requests a remote access service to be authenticated.The information for identifying each of the first device 110 and thesecond device 120 may be identification information assigned to eachdevice such as a media access control (MAC) address or a phone number ofeach of the first device 110 and the second device 120. The aboveexamples of authentication information are examples, and thus, thepresent disclosure is not limited thereto.

Next, in operation S920, the first device 110 may transmit informationthat requests the second device 120 to authenticate a remote accessservice to the second device 120. The information that requests thesecond device 120 to authenticate the remote access service may beincluded in the authentication information and may be transmitted alongwith other information.

Next, in operation S930, it is determined whether the first device 110receives information indicating that the request of the first device 110(transmitted in S920) is acknowledged from the second device 120 as aresult of the authentication performed by the second device 120. When itis determined in operation S930 that the first device 110 receives theinformation indicating that the request of the first device 110 isacknowledged from the second device 120, the process proceeds tooperation S940. In operation S940, the first device 110 may recognizethat the authentication has succeeded.

In operation S950, the first device 110 may remotely access the seconddevice 120 and may transmit content to the second device 120.

FIG. 10 is a flowchart illustrating a process performed by the firstdevice 110 to be connected through a network to the second device 120,according to an example embodiment of the present disclosure.

When authentication of a remote access service is completed (or whenauthentication has succeeded), the first device 110 may checkinformation about networks which the second device 120 may access, inoperation S1010. The first device 110 may receive network informationincluding the information about the networks which the second device 120may access from the second device 120.

Next, in operation S1020, the first device 110 may select a network tobe connected to the second device 120 through remote access from amongthe networks which the second device 120 may access. In operation S1030,the first device 110 may be connected to the second device 120 throughthe selected network. As a non-limiting example, the first device 110may receive from the second device 120 a list of networks including theInternet and a mobile communication network using a code divisionmultiple access (CDMA) method which the second 120 may access. Next, thefirst device 110 may select the Internet, and may remotely access thesecond device 120 by using the Internet.

In addition, the first device 110 may display a list of networks, andmay select a network used to be connected to the second device 120 byreceiving the user's input. Alternatively, depending on embodiments, thefirst device 110 may select a network according to a priority preset toeach network from among the networks which the second device 120 mayaccess.

FIG. 11 is a flowchart illustrating a process performed by the firstdevice 110 to share content with the third device 130 connected to thesecond device 120, according to an example embodiment of the presentdisclosure.

When authentication of a remote access service is completed (or whenauthentication has succeeded), the first device 110 may receive a listof devices connected to the second device 120 from the second device120, in operation S1110. The devices connected to the second device 120may be devices connected to a home network or a local network to whichthe second device 120 is connected. Also, the devices connected to thesecond device 120 may be devices that are connected to the same AP asthe second device 120.

Next, in operation S1120, the first device 110 may display the list ofdevices connected to the second device 120. For example, the firstdevice 110 may display the list of devices connected to the seconddevice 120 as shown in a list 1510 of FIG. 15 or 1600 of FIG. 16. Also,the list of devices connected to the second device 120 may include thesecond device 120.

Further, in the list of devices connected to the second device 120, thefirst device 110 may display only devices which are capable ofreproducing or which may reproduce the content selected to be shared bythe first device 110 in the list of devices connected to the seconddevice 120. For example, when a television and an audio device areconnected to the second device 120 and the content which the firstdevice 110 is to share with the second device 120 is a moving picture,the first device 110 may display only the television in the list becausethe television may reproduce the moving picture and the audio device maynot be able to reproduce the moving picture.

Next, in operation S1130, the first device 110 may select the thirddevice 130 with which content is to be shared from among the devicesconnected to the second device 120. The first device 110 may display alist of pieces of content which may be shared and a list of devicesconnected to the second device 120. Further, the first device 110 mayselect content to be shared from the list of pieces of content and mayselect the third device 130 with which the content is to be shared fromthe list of devices connected to the second device 120. For example, thefirst device 110 may select content to be shared and the third device130 with which the content is to be shared according to an input bydragging and dropping the content to be shared to an item included inthe list of devices connected to the second device 120, as shown in FIG.16.

The first device 110 may receive the list 1600 (of FIG. 16) of devicesconnected to the second device 120 from the second device 120 which isbeing called, and may display the received list 1600 of devicesconnected to the second device 120. Also, the first device 110 maydisplay a list 1610 of pieces of content which the first device 110 mayshare with at least one device connected to the second device. Dependingon embodiments, the selected content may be shared with more than onedevice that is connected to the second device 120.

Also, the first device 110 may check whether a drag and drop eventoccurs from an area that displays predetermined content in the list 1610of pieces of content displayed on the first device 110 to an area thatdisplays a predetermined device in the list 1600 of devices connected tothe second device 120. The drag and drop event may be input through acurser included in a graphical user interface (GUI) displayed on thefirst device 110 or through an interactive display device, such as atouch-screen, however, the present disclosure is not limited thereto.

The first device 110 may select content to be shared and a device withwhich the content is to be shared according to the drag and drop event.For example, in FIG. 16, the first device 110 may transmit contentcorresponding to a ‘photograph 1’ to a device corresponding to a ‘device2’ connected to the second device 120. The second device 120 may be adevice which is being called by the first device 110.

In operation S1140, the first device 110 may remotely access the thirddevice 130 and may transmit the content to the third device 130.

The first device 110 may receive network information for remotelyaccessing the third device 130 from the second device 120.

The network information for remotely accessing the third device 130 maybe included in the list 1600 of devices connected to the second device120.

FIG. 12 is a flowchart illustrating a process performed by the server1400 to perform authentication based on a call connection state betweenthe first device 110 and the second device 120, according to an exampleembodiment of the present disclosure.

When receiving a request of a remote access service, in operation S1210,the server 1400 may obtain information about a call connection statebetween the first device 110 and the second device 120. The server 1400may receive the information about the call connection state from aserver of a base station that relays the first device 110 and the seconddevice 120. Alternatively, the server 1400 may obtain the informationabout the call connection state through the connection state checkingunit 1420 included in the server 1400, as shown in FIG. 14.

Next, in operation S1220, the server 1400 may authenticate the remoteaccess service for sharing content. Next, in operation S1230, the server1400 may transmit a result of the authentication to the first device 110and the second device 120. In this case, the server 1400 may transmitnetwork information of the second device 120 to the first device 110.

FIG. 13 is a block diagram illustrating the first device 110, accordingto an example embodiment of the present disclosure.

The first device 110 may include an authentication unit 1310 thatperforms authentication of a remote access service for transmittingcontent to the second device 120, an information transmitting/receivingunit 1320 that transmits/receives information, a content sharing unit1340 that remotely accesses the second device 120 based on a result ofthe authentication and shares content with the second device 120 basedon the remote access, and a control unit 1300 that controls each of theelements. At least one of the above-described units may include one ormore processing devices. The first device 110 may additionally include astorage unit 1330 and a gesture unit 1350, depending on embodiments.

The second device 120 is a device which is being called by the firstdevice 110. The authentication unit 1310 may perform authentication of aremote access service for sharing content with the second device 120which is being called by the first device 110. The authentication unit1310 may transmit authentication information about the remote accessservice through the information transmitting/receiving unit 1320 to thesecond device 120 or the server 1400. For example, the authenticationinformation may include information for remotely accessing the seconddevice 120 and information that requests the remote access service forsharing content to be authenticated. The authentication unit 1310 mayperform authentication when receiving information about a result of theauthentication based on a call connection state between the first device110 and the second device 120 from the second device 120 or the server1400. The information about the result of the authentication may bereceived through the information transmitting/receiving unit 1320. Also,the information transmitting/receiving unit 1320 may transmit/receivethe information about the result of the authentication and theinformation that requests the remote access service to be authenticatedthrough a mobile communication network.

Moreover, depending on embodiments, the first device 110 may furtherinclude a storage unit 1330 that stores a phone number, and theauthentication unit 1310 may perform authentication of the remote accessservice in further consideration of whether a phone number of the seconddevice 120 is stored in the storage unit 1330. The storage unit 1330which may be a computer-readable recording medium included in a separateserver or a storage medium included in the first device 110 may record adatabase including information about a phone number.

For example, the authentication unit 1310 may determine whether a phonenumber of the second device 120 which is being called is stored in thestorage unit 1330. When the phone number of the second device 120 isstored in the storage unit 1330, the authentication unit 1310 mayperform authentication of the remote access service.

Alternatively, depending on embodiments, the storage unit 1330 may storean encryption key for performing authentication of the remote accessservice. The authentication unit 1310 may determine whether a phonenumber of the second device 120 is stored in the storage unit 1330. Whenthe authentication unit 1310 determines that the phone number of thesecond device 120 is stored in the storage unit 1330, the informationtransmitting/receiving unit 1320 may transmit the encryption key storedin the storage unit 1330 to the second device 120 or the server 1400along with the authentication information. The encryption key may beincluded in the authentication information and then may be transmitted.

Alternatively, depending on embodiments, the informationtransmitting/receiving unit 1320 may transmit a text for performingauthentication to the second device 120. An answer to a questiontransmitted to the user of the first device 110 through a call may betransmitted to the second device 120 through a text. The second device120 may determine whether authentication of the remote access service isperformed based on whether the received text and a text preset in thesecond device 120 are the same. When the received text from the firstdevice 110 and the preset text of the second device 120 are the same,the second device 120 may transmit a result of the authenticationincluding information indicating that the authentication is acknowledgedto the first device 110.

As a non-limiting example, a name of the user of the second device 120may be preset in the second device 120. The user of the second device120 may request the name to be transmitted through a call by using avoice. The user of the first device 110 may transmit a text through ashort message service (SMS). When the text included in the SMS and thename of the user preset in the second device 120 are the same, the firstdevice 110 may receive information about a result of the authenticationfrom the second device 120, thereby completing the authenticationprocess.

Alternatively, depending on embodiments, the informationtransmitting/receiving unit 1320 may transmit voice data for performingauthentication of the remote access service to the second device 120. Ananswer to a question transmitted to the user of the first device 110through a call may be transmitted to the second device 120 through thevoice data. The second device 120 may generate a text from the voicedata through voice recognition. The second device 120 may determinewhether authentication of the remote access service is to be performedbased on whether the text generated from the voice data and a textpreset in the second device 120 are the same. When the text generatedfrom the voice data includes the preset text, the second device 120 maytransmit a result of the authentication including information indicatingthat the authentication is acknowledged to the first device 110.

Alternatively, depending on embodiments, the first device 110 mayfurther include a gesture input unit 1350 that generates informationabout a gesture. The information transmitting/receiving unit 1320 maytransmit the information about the gesture along with the authenticationinformation to the server 1400 or the second device 120. Theauthentication may be performed in further consideration of theinformation about the gesture by receiving information about a result ofthe authentication according to the information about the gesture fromthe server 1400 or the second device 120.

For example, the first device 110 may transmit to the server 1400information about a gesture of holding the second device 120 and makinga circular motion along with the authentication information, and thesecond device 120 may transmit to the server 1400 the information abouta gesture of holding the second device 120 and making a circular motionalong with the authentication information. The server 1400 may determinewhether authentication is performed by determining a similarity betweenthe information about the gesture received from the first device 110 andthe information about the gesture received from the second device 120.

Also, the content sharing unit 1340 may include a network connectionunit 1360 that remotely accesses the second device 120 when theauthentication unit 1310 completes the authentication. The networkconnection unit 1360 may remotely access the second device 120 or thethird device 130 based on network information about the second device120 or the third device 130, respectively, connected to the seconddevice 120 received from the server 1400 or the second device 120.

Also, the control unit 1300 may include a processor that controls eachelement.

FIG. 14 is a block diagram illustrating the server 1400, according to anexample embodiment of the present disclosure.

The server 1400 may include an authentication unit 1410 that performsauthentication when receiving an authentication request from the firstdevice 110, a connection state checking unit 1420 that checks a callconnection state between the first device 110 and the second device 120,an authentication result transmitting unit 1430 that transmits a resultof the authentication performed by the authentication unit 1410 to thefirst device 110, a storage unit 1440 that stores information related tothe authentication, and a control unit 1450 that controls each of theelements. At least one of the above-described units may include one ormore processing devices.

The authentication request received from the first device 110 mayinclude information for remotely accessing the second device 120 and anauthentication request for a remote access service for sharing contentwith the second device 120.

The authentication unit 1410 may perform authentication according to thecall connection state between the first device 110 and the second device120 checked by the connection state checking unit 1420. Also, theauthentication unit 1410 may perform authentication by using informationabout the call connection state checked by the connection state checkingunit 1420 as an encryption key. That is, when the first device 110 iscalling the second device 120, authentication may be performed accordingto the authentication request of the first device 110.

Alternatively, the authentication unit 1410 may obtain information aboutwhether a phone number of the second device 120 is stored in the firstdevice 110, and may perform authentication in further consideration ofthe information about whether the phone number of the second device 120is stored in the first device 110. The authentication unit 1410 maycheck whether the first device 110 is calling the second device 120through the connection state checking unit 1420. The authentication unit1410 may receive the information about whether the phone number of thesecond device 120 is stored in the first device 110 from the firstdevice 110. When the first device 110 is calling the second device 120and the phone number of the second device 120 is stored in the firstdevice 110, authentication may be performed according to theauthentication request of the remote access service of the first device110.

Alternatively, the authentication unit 1410 may receive voice data fromthe first device 110 and the second device 120. The authentication unit1410 may perform authentication in further consideration of the voicedata received from the first device 110 and the second device 120.

For example, the authentication unit 1410 may include a voicerecognition unit that generates a text by using voice recognition fromthe voice data received from the first device 110 and the second device120. The authentication unit 1410 may compare the voice data receivedfrom the first device 110 and the second device 120 with a text.Authentication may be performed in further consideration of whether thetwo texts are the same.

Alternatively, the authentication unit 1410 may receive informationabout a gesture from the first device 110 and the second device 120. Theauthentication unit 140 may compare the information about the gesturereceived from the first device 110 with the information about thegesture received from the second device 120. The authentication unit1410 may perform authentication in further consideration of a result ofthe comparison of the information about the gesture.

Also, the authentication unit 1410 may receive information about whetheran authentication request received from the first device 110 to thesecond device 120 is acknowledged. For example, the authentication unit1410 may transmit information asking whether the authentication requestis acknowledged to the second device 120, and the second device 120 mayreturn the information about whether the authentication request isacknowledged according to the user's input to the server 1400. Whenreceiving information indicating that the authentication request isacknowledged from the second device 120, the authentication unit 1410may perform authentication of a remote access service.

Also, the connection state checking unit 1420 may check whether thefirst device 110 is calling the second device 120. The connection statechecking unit 1420 may check whether the first device 110 is calling thesecond device 120 by directly relaying the first device 110 and thesecond device 120.

Alternatively, the connection state checking unit 1420 may receiveinformation about a call connection state from the server of the basestation 200 which relays the first device 110 and the second device 120.

Further, the authentication result transmitting unit 1430 may transmitinformation about a result of the authentication performed by theauthentication unit 1410 to the first device 110. Also, theauthentication result transmitting unit 1430 may transmit networkinformation used by the first device 110 to access the second device 120along with the information about the result of the authentication. Thenetwork information may be stored in the storage unit 1440 included inthe server 1400, or may be received from the second device 120.

For example, when the authentication unit 1410 successfully completesauthentication, the server 1400 may receive IP information of the seconddevice 120 from the second device 120. The authentication resulttransmitting unit 1430 may transmit the received IP information of thesecond device 120 to the first device 110.

Moreover, the storage unit 1440 may include information forauthentication of a remote access service and information used by thefirst device 110 to remotely access the second device 120. Theinformation for the authentication of the remote access service mayinclude an encryption key for performing authentication. The encryptionkey may include information about a call connection state between thefirst device 110 and the second device 120. Also, the information usedby the first device 110 to remotely access the second device 120 mayinclude network information about the second device 120.

Also, the control unit 1450 may include a processor that controls eachelement.

FIG. 15 is a diagram illustrating content and a user interface forselecting a device with which the content is to be shared, according toan example embodiment of the present disclosure.

Referring to FIG. 15, the first device 110 may display the list 1500 ofpieces of content which the first device 110 may share. For example,list 1500 includes an array of photographs that are available forsharing with another device. Also, the first device 110 may selectcontent to be shared through the user interface on which the list 1500of pieces of content to be shared is displayed. For example, FIG. 15shows that several of the photographs of list 1500 have been selected.When the first device 110 is calling the second device 120, the firstdevice 110 may select content to be shared, may perform authenticationby selecting a sharing button displayed on the user interface, and maytransmit the selected content to the second device 120 by remotelyaccessing the second device 120.

Also, when content is selected and the sharing button is input, thesecond device 120 and the list 1510 of devices connected to the seconddevice 120 may be displayed. The first device 110 may receive an inputthat selects a device in the displayed list 1510 from the list. When thedevice is selected in the list 1510, the first device 110 may performauthentication and may remotely access the selected device. The firstdevice 110 may transmit content to the selected device which is remotelyaccessed.

FIG. 16 is a diagram illustrating content to be shared by the firstdevice 110 and a user interface for selecting a device connected to thesecond device 120 with which the content is to be shared, according toan example embodiment of the present disclosure.

Referring to FIG. 16, the first device 110 may receive the list 1600 ofdevices connected to the second device 120 from the second device 120which is being called, and may display the received list 1600 of devicesconnected to the second device 120. Also, the first device 110 maydisplay a list 1610 of pieces of content which the first device 110 mayshare.

Also, the first device 110 may check whether a drag and drop eventoccurs from an area of displaying predetermined content in the list 1610of pieces of content displayed on the first device 110 to an area ofdisplaying a predetermined device in the list 1600 of devices. The dragand drop event may be input through a cursor included in a GUI displayedon the first device 110, or through an interactive display device suchas a touch-screen.

The first device 110 may select content to be shared and a device withwhich the selected content is to be shared, according to the drag anddrop event. For example, in FIG. 16, the first device 110 may transmitcontent corresponding to a ‘photograph 1’ to a ‘device 2’ connected tothe second device 120. The second device 120 may be a device which isbeing called by the first device 110.

FIG. 17 is a diagram illustrating content of the second device 120 to bereceived from the second device 120 and a user interface for selecting adevice connected to the first device 110 which is to receive thecontent, according to an example embodiment of the present disclosure.

Referring to FIG. 17, the first device 110 may display a list 1700 ofdevices connected to the first device 110. The devices connected to thefirst device 110 may include devices connected through a home network ora local network to the first device 110. Also, the devices connected tothe first device 110 may include devices that are connected to the sameAP as the first device.

Also, the first device 110 may receive a list 1710 of pieces of contentwhich the second device 120 may share from the second device 120 or theserver 1400. The first device 110 may display the list 1710 of pieces ofcontent.

Also, the first device 110 may check whether a drag and drop eventoccurs from an area that displays predetermined content in the list 1710of pieces of content of the second device 120 displayed on the firstdevice 110 to an area that displays a predetermined device in the list1700 of devices.

The first device 110 may select content to be shared and a device withwhich the content is to be shared, according to the drag and drop event.For example, in FIG. 17, the first device 110 may control the seconddevice 120 to transmit content corresponding to a ‘photograph 1’ to adevice corresponding to a ‘device 2’ connected to the first device 110by remotely accessing the second device 120.

The one or more embodiments of the present disclosure may be embodied asa recording medium, e.g., a program module to be executed in computers,which include computer-readable commands. The results produced can bedisplayed on a display of the computing hardware. The computer storagemedium may include any usable medium that may be accessed by computers,volatile and non-volatile media, and detachable and non-detachablemedia. Also, the computer storage medium may include a computer storagemedium and a communication medium. The computer storage medium includesall of volatile and non-volatile media, and detachable andnon-detachable media which are designed to store information includingcomputer readable commands, data structures, program modules, or otherdata. The communication medium includes computer-readable commands, adata structure, a program module, and other transmission mechanisms, andincludes other information transmission media. Examples of thecomputer-readable recording media include a magnetic recordingapparatus, an optical disk, a magneto-optical disk, and/or asemiconductor memory (for example, RAM, ROM, etc.). Examples of themagnetic recording apparatus include a hard disk device (HDD), aflexible disk (FD), and a magnetic tape (MT). Examples of the opticaldisk include a DVD (Digital Versatile Disc), a DVD-RAM, a CD-ROM(Compact Disc-Read Only Memory), and a CD-R (Recordable)/RW.

Further, according to an aspect of the embodiments, any combinations ofthe described features, functions and/or operations can be provided.

Moreover, the devices and servers discussed above may include at leastone processor to execute at least one of the above-described units andmethods.

The present disclosure may, however, be embodied in many different formsand should not be construed as being limited to the embodiments setforth herein; rather these embodiments are provided so that thisdisclosure will be thorough and complete, and will fully convey theinventive concept to one of ordinary skill in the art. For example, anexpression used in the singular may encompass the expression in theplural and an expression used in the plural may encompass the expressionin the singular.

While the present disclosure has been particularly shown and describedwith reference to exemplary embodiments thereof, it will be understoodby those of ordinary skill in the art that various changes in form anddetail may be made therein without departing from the spirit and scopeof the present disclosure as defined by the following claims.

What is claimed is:
 1. A method of sharing content, the methodcomprising: performing authentication of a remote access service forsharing content of a first device with a second device based on atelephonic connection being established between the first device and thesecond device; remotely accessing the second device via networkinformation about the second device received from the second device,according to a result of the performed authentication; and sharing thecontent based on the remote access.
 2. The method of claim 1, whereinthe remotely accessing the second device comprises: obtaining aninternet protocol address of the second device according to the resultof the authentication; and remotely accessing the second device by usingthe obtained internet protocol address.
 3. The method of claim 1,wherein the performing of the authentication comprises performing theauthentication in further consideration of whether a phone number of thesecond device is stored in the first device.
 4. The method of claim 1,wherein the performing of the authentication comprises: transmitting toa server authentication information that requests the server toauthenticate the remote access service; and receiving from the serverinformation about the result of the authentication based on thetelephonic connection between the first device and the second device. 5.The method of claim 4, wherein the transmitting of the authenticationinformation to the server comprises: storing an encryption key for theauthentication; and when a phone number of the second device is storedin the first device, transmitting the stored encryption key to theserver along with the authentication information that requests theauthentication server to authenticate the remote access service.
 6. Themethod of claim 1, wherein the performing of the authenticationcomprises: transmitting authentication information that requests thesecond device to authenticate the remote access service to the seconddevice; and receiving the result of the authentication of the remoteaccess service from the second device.
 7. The method of claim 1, furthercomprising checking information about networks that the second devicehas access to through a mobile communication network used for callconnection, wherein the remotely accessing the second device comprisesaccessing the second device according to the information about thenetworks that the second device has access to and the result of theauthentication.
 8. The method of claim 1, wherein the sharing of thecontent of the first device comprises: receiving information aboutdevices connected to the second device from the second device based onthe result of the authentication; displaying a list of the devicesconnected to the second device and selecting a third device in the listto which the content is to be transmitted; obtaining network informationof the third device; accessing the third device by using the networkinformation of the third device; and sharing the content of the firstdevice with the third device.
 9. The method of claim 8, wherein thedisplaying of the list of the devices connected to the second device andthe selecting of the third device with which the content is to be sharedcomprises: selecting a device on which the content is reproducible fromamong the devices connected to the second device; and displaying a listof the selected device.
 10. The method of claim 1, further comprising:displaying a list of pieces of content that are available for the firstdevice to share; and selecting content to be shared from the displayedlist, wherein the selecting of the content comprises: displaying thesecond device and a list of devices connected to the second device; andselecting the content based on a drag and drop event between the seconddevice and the list of devices connected to the second device from thedisplayed list of pieces of content.
 11. A first device for sharingcontent, the first device comprising: a processor device that performsauthentication of a remote access service for sharing the content with asecond device based on a telephonic connection state being establishedbetween the first device and the second device; and a communication unitthat remotely accesses the second device, via network information aboutthe second device received from the second device, based on a result ofthe authentication and shares the content with the second device basedon the remote access.
 12. The first device of claim 11, furthercomprising a storage that stores a phone number, wherein the processorperforms the authentication of the remote access service in furtherconsideration of whether a phone number of the second device is storedin the storage.
 13. The first device of claim 11, wherein thecommunication unit obtains an internet protocol address of the seconddevice according to the result of the authentication, and remotelyaccesses the second device by using the obtained internet protocoladdress.
 14. The first device of claim 11, wherein the communicationunit transmits to a server authentication information that requests theserver to authenticate the remote access service, and receives from theserver information about the result of the authentication based on thetelephonic connection between the first device and the second device.15. The first device of claim 14, wherein the storage stores anencryption key for the authentication, and wherein when a phone numberof the second device is stored in the first device, the communicationunit transmits the stored encryption key to the server along with theauthentication information that requests the authentication server toauthenticate the remote access service.
 16. The first device of claim11, wherein the communication unit transmits authentication informationthat requests the second device to authenticate the remote accessservice to the second device, and receives the result of theauthentication of the remote access service from the second device. 17.The first device of claim 11, wherein the processor checks informationabout networks that the second device has access to through a mobilecommunication network used for call connection, and wherein thecommunication unit accesses the second device according to theinformation about the networks that the second device has access to andthe result of the authentication.
 18. The first device of claim 11,further comprising a display, wherein the communication unit receivesinformation about devices connected to the second device from the seconddevice based on the result of the authentication, wherein the displaydisplays a list of the devices connected to the second device, whereinthe processor selects a third device in the list to which the content isto be transmitted, and wherein the communication unit obtains networkinformation of the third device, accesses the third device by using thenetwork information of the third device, and shares the content of thefirst device with the third device.
 19. The first device of claim 18,wherein the processor selects a device on which the content isreproducible from among the devices connected to the second device, andwherein the display displays a list of the selected device.
 20. Thefirst device of claim 11, wherein the display displays a list of piecesof content that are available for the first device to share, anddisplays the second device and a list of devices connected to the seconddevice, and wherein the processor selects the content based on a dragand drop event between the second device and the list of devicesconnected to the second device from the displayed list of pieces ofcontent.